NW7.30 and ESS/MSS

Hello All,

We've installed a new Portal 7.30 system on which we want to use ESS/MSS in combination with an ECC 6 backend (basis 6.04, HR and EA-HR 600). It's totally unclear which version of the ESS/MSS components we need to use (if any). There's a lot of chatter claiming that 600 versions are supported, others say that 603 is supported and yet others that say that it isn't supported yet. Does anybody have the definite answer?